It is my pleasure to assist you with this question today. My name is Jason Blair and I am a professor of Sociology in Arizona.
Basically, a trade book is a book or manual that is specific to a topic. Since your specific question relates to social studies topics, you would be talking about trade books that focused, say, on population demographics in the Congo. Trade books can be quite technical, as they are designed more for people who have a specific interest in a given field of study. ...
This solution provides a brief synopsis of the differences between the information contained in a textbook and a trade book respectively.